.tutorial-hero {
  position: relative;
  padding-top: clamp(64px, 9vw, 112px);
  padding-bottom: clamp(56px, 8vw, 96px);
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-page);
}

.tutorial-hero::before,
.tutorial-hero::after {
  position: absolute;
  z-index: -1;
  border: 1px solid var(--color-arc-accent);
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.tutorial-hero::before {
  top: -210px;
  right: -130px;
  width: 480px;
  height: 480px;
}

.tutorial-hero::after {
  top: -128px;
  right: -42px;
  width: 310px;
  height: 310px;
  border-color: var(--color-arc-rose);
}

.tutorial-hero h1 {
  max-width: 760px;
  margin-top: 18px;
}

.tutorial-hero .lead {
  max-width: 760px;
  margin-bottom: 0;
}

.tutorial-fact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.tutorial-content {
  padding-top: clamp(48px, 7vw, 88px);
}

.tutorial-prose {
  max-width: var(--reading-max);
  margin-inline: auto;
  padding-top: 26px;
}

.tutorial-prose > .callout:first-child {
  margin-top: 0;
}

.tutorial-chapter,
.tutorial-step {
  scroll-margin-top: 96px;
}

.tutorial-chapter {
  padding-top: 58px;
}

.tutorial-step {
  margin-top: 74px;
  padding: clamp(24px, 5vw, 46px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-page);
  box-shadow: var(--shadow-card);
}

.tutorial-step h2,
.tutorial-chapter h2 {
  margin-top: 10px;
}

.tutorial-step h3 {
  margin-top: 36px;
}

.step-heading {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: start;
  gap: 18px;
  margin-bottom: 28px;
}

.step-heading h2 {
  margin-bottom: 0;
}

.step-number {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  box-shadow: var(--shadow-pill);
}

.mode-summary {
  margin-top: 34px;
}

.mode-summary h3 {
  margin-top: 0;
}

.tutorial-definition-list {
  display: grid;
  gap: 14px;
  margin-bottom: 0;
}

.tutorial-definition-list > div {
  display: grid;
  grid-template-columns: minmax(150px, .7fr) minmax(0, 1.3fr);
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.tutorial-definition-list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.tutorial-definition-list dt {
  color: var(--color-text);
  font-weight: 700;
}

.tutorial-definition-list dd {
  margin: 0;
  color: var(--color-muted);
}

.tutorial-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  margin-top: 48px;
  padding: clamp(24px, 4vw, 36px);
  background: var(--color-panel);
}

.tutorial-next h3 {
  margin-top: 6px;
}

.tutorial-next p:last-child {
  margin-bottom: 0;
}

@media (max-width: 700px) {
  .tutorial-prose {
    padding-top: 20px;
  }

  .tutorial-step {
    margin-top: 58px;
    padding: 22px 18px;
  }

  .step-heading {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 13px;
  }

  .step-number {
    width: 44px;
    height: 44px;
    font-size: 12px;
  }

  .tutorial-definition-list > div,
  .tutorial-next {
    grid-template-columns: 1fr;
  }

  .tutorial-next .button-row {
    align-items: stretch;
  }

  .tutorial-next .button {
    flex: 1 1 160px;
  }
}

@media (max-width: 480px) {
  .tutorial-hero::before {
    right: -260px;
  }

  .tutorial-hero::after {
    right: -190px;
  }

  .tutorial-step {
    padding: 20px 16px;
  }

  .step-heading {
    grid-template-columns: 1fr;
  }

  .tutorial-fact-row .badge {
    width: 100%;
  }
}